Die for swaging carriage-clips



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VBNTORI UNITED STATES PATENT- OFFICE.

STEPHEN M. HOYE, OF MOUNT CARMEL, CONNECTICUT.

DIE FOR SWAGING CARRIAGE-CLIPS.

SPECIFICATION forming part of Letters Patent N0. 228,636, dated June 8, 1880.

- Application filed August 20, 1879.

To all whom it may concern:

Be it known that I, STEPHEN M. HoYE, of Mount Carmel, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Dies for Swaging Carriage-Clips and I do hereby declare that the following is a full clear, and exact description of the same.

My invention'relates to improved swagingdies for producing a carriage-clip.

Dies of the ordinary construction have no side or end stops to confine the metal in its proper place. It escapes at both sides and ends of the dies. The clip therefore has a rough edge and requires to be trimmed, which is done in a trimming-press. From such press the clip is placed under a trip-hammer, for the purpose of rounding and pointing the shank.

By my improved dies I produce a perfect clip at one operation, and am therefore enabled to manufacture clips very economically.

The details of the construction and operation of my dies are as follows, reference being made to accompanying drawings, in which- Figure 1 is a longitudinal vertical section of the dies. Fig. 2 is a plan view of the follower inverted. Figs. 3, 4, 5 are cross-sections on lines a; or, y y, and w 20, respectively, of Fig. l and Fig. 6 is a cross-section on line 2 2, Fig. 2. Fig. 7 represents the rod or blank from which the clip is made. and Fig. 8 is the clip as produced complete by the dies.

The clip is made from a piece, 1, of round iron, Fig. 7, whose length is a little less than that of the matrix A. This piece having been heated red hot is placed in the die A, on the floor thereof. The plunger C is then brought down on such blank and swages it to the proper shape at one operation, so that on removing it from the die A it is found perfect in form, as shown in Fig. 8, since no metal is forced out laterally between the edges of the plunger C and matrix A by their swaging action, and hence the clip has no rough edges which require to be trimmed off.

escaping laterally at those points.

The success of the operation depends largely upon the fact that the blank is of less length than the bottom of the matrix and of less width than any part of the same; but it also depends in part upon the construction of the dies with side and end stops, as I will proceed to describe.

The ends a a and sides I) b of the matrix A are shaped or inclined outward, and the corresponding ends and sides of the plunger C slope or incline inward at the same angle, so that when the said parts or dies are brought together, as shown in Fig. l, the ends and sides of therespccth e parts will meet and form a close joint.

. The shanks or cylindrical ends of the clips are formed by the partsfj" ot' the respective upper and lower dies. These are constructed with lengthwise concavities or grooves, the upper die, C, having parallel lips, Figs. 4 and 6, that lit close against or wedge between the opposite sides of the die A when the swaging action takes place, and thus prevent the metal Pendent lips e are also formed on the upper die or plunger, C, at the outer ends of the grooves or concavities f, whose function is to prevent the metal of the blank escaping at the ends of the dies when the plungerdescends, at which time the lips 0 come in contact or wedge with the sloping ends a of matrix A, as shown in Fig. 1.

- The function of the lips e is, however, as-

sisted or facilitated by reason of the length of the blank being somewhat less than the distance between said lips e.

What I claim is-- The matrix A, having the lengthwise concavityf, and the plunger C, having the lips f fand e e, and both matrix and plunger provided with sloping sides I) and ends a jointly, as and for the purpose set forth.

STEPHEN M. HOYE.

Witnesses:

JOHN S. HOYE, THOMAS WRENN. 

